https://javapro-en.svenruppert.com/authors/ren%C3%A9-schwietzke/Recent content in René Schwietzke on JAVAPRO InternationalHugoen-USTue, 23 Jun 2026 07:00:02 +0000https://javapro-en.svenruppert.com/1brc-the-first-80-of-the-journey/Tue, 23 Jun 2026 07:00:02 +0000https://javapro-en.svenruppert.com/1brc-the-first-80-of-the-journey/<p>The <a href="https://www.morling.dev/blog/one-billion-row-challenge/">One Billion Row Challenge (1BRC)</a> started as a way to kill time during the 2023/2024 holidays, asking a simple question: How fast can Java crunch temperature values from a text file and calculate the min, mean, and max per weather station? The catch is that the file contains one billion rows, totaling approximately 13.8 GB.</p> <p>Thomas Wuerthinger, Quan Anh Mai, and Alfonso Peterssen achieved the best result of 1.5 seconds on 8 cores. That was insanely and unexpectedly fast. But when you take a closer look at the code, you will see that it is beyond your daily dose of Java. It is a complex, single-use-case-oriented implementation, skipping safety features, and most of the tunings applied cannot be easily reused.</p>